* {
  box-sizing: border-box;
}

body {
  padding: 24px;
}

button {
  outline: 0;
  cursor: pointer;
}

#app {
  max-width: 800px;
  margin: 0 auto;
}

.measure-example header,
.measure-example main {
  display: flex;
}

.paragraphs {
  flex: 1;
}
.paragraphs-measurements {
  flex: 1;
}

.square {
  width: 50%;
  height: 300px;
  background: orange;
}

.animate {
  animation: animateInOut 1000ms infinite;
}

@keyframes animateInOut {
  0%,
  100% {
    width: 50%;
    height: 300px;
  }
  50% {
    width: 100%;
    height: 600px;
  }
}
